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NUR170 Exam 4 Perfusion Review Questions with Verified Correct Answers Delaware Technical & Community College.pdf

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This document contains the NUR170 Exam 4 Perfusion Review Questions with Verified Correct Answers Delaware Technical & Community C

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NUR170: Exam 4 Perfusion Review
Questions with Verified Correct
Answers Delaware Technical &
Community College
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, Preload - Answer: The amount of cardiac muscle fiber tension or
"stretch" that exists at the end of diastole

Influenced by venous return and compliance of ventricles

Factors affecting preload - Answer: -Volume: venous return,
total blood volume, atrial kick
-Compliance: stiffness and thickness of ventricular wall

Afterload - Answer: The force the ventricles must overcome to
eject their blood volume.

Factors affecting afterload - Answer: -blood/fluid volume
-compliance of vessels
-arterial vasoconstriction
-flow patterns
-infection/sepsis
-medications

First heart sound (S1) - Answer: -The "lub"
-Closure of AV valves when ventricles fill

Second heart sound (S2) - Answer: -The "dub"
-Closure of semilunar valves when ventricles empty blood into
aorta and pulmonary arteries

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